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Problems solved by technology
[0008] The purpose of the present invention is to provide a method for preparing coal-based briquette activated carbon, to solve the problem that the quality of activated carbon is affected due to the difficulty in preparing coal-based briquette activated carbon when no binder is used in the prior art. question
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Embodiment 1
[0050] (1), Xinjiang Hami coal is pulverized to coal powder with an average particle size of 29 μm, and sieved, wherein the content of coal powder with a particle size greater than 80 μm is 2.5 wt %; the content of coal powder with a particle size greater than 40 μm is 28 wt %;
[0051] (2), send the pulverized coal obtained in (1) into the feed bin of the briquette forming equipment, and carry out degassing treatment to the material in the feed bin, keep the negative pressure in the feed bin At 2.5kPa~3kPa;
[0052] (3) Keep the temperature of the material in the feeding bin at 50°C to 55°C, and adjust the moisture content to 7wt to 8wt%;
[0053] (4), the material in the feed bin is sent into the molding equipment through the screw forced feeder for molding, and the linear pressure between the rollers is about 11~12t / cm during molding, so as to obtain the molding briquette (briquette ).
[0056] The difference from Example 1 is that the raw coal is a mixture of Xinjiang Hami coal and Heishan mining area longbituminous coal in a mass ratio of 1:1.
[0057] Detect the strength of the briquette, and the strength of the drum (GB / T7702.3-2008) is 91.4%.
Embodiment 3
[0059] (1) Mix Xinjiang Hami coal and Heishan mining area longbituminous coal uniformly at a mass ratio of 1:1, and crush to coal powder with an average particle size of 35 μm, and then sieve, wherein the content of coal powder with a particle size greater than 80 μm is 8.2 wt%; the content of pulverized coal with a particle size greater than 40 μm is 22wt%;
[0060] (2) Send the pulverized coal obtained in (1) into the mixing chamber for stirring and degassing. The top of the mixing chamber is equipped with an air extraction pipeline to make the density of the pulverized coal after stirring reach 0.60-0.65kg / L, and then pass through the star valve The pulverized coal in the mixing bin is sent to the feeding bin of the briquetting equipment.
[0061] (3) Carry out degassing treatment to the material in the feed bin, keep the negative pressure in the feed bin at 2.5kPa~3kPa;
[0062] (4), keeping the temperature of the material in the feeding bin at 80°C to 85°C, and adjusting...
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Abstract
The invention discloses a preparing method for coal-based briquetteactive carbon without a binding agent.The forming process comprises the steps that raw materialcoal is prepared into shaped coal with a shaping process; the obtained shaped coal is broken and granulated, and then carbonization treatment and activation treatment are carried out to prepare active carbon.In the preparing method, the raw material coat shaping process is high in coal variety adaptability, a shaped coal product with the strength higher than 90% can also be prepared even with non-caking coal with the maximum shaping difficulty as the raw material coal under the situation that no binding agent needs to be adopted, and thus the quality such as the strength of the active carbon can be easily improved.
Description
technical field [0001] The invention belongs to the field of coal-based activated carbon preparation, in particular to a method for preparing binder-free coal-based briquetted activated carbon. Background technique [0002] Because activated carbon has a highly developed pore structure and a large specific surface area, its applications range from decolorization and deodorization of food and medicine, gas masks, to large-scale use in solvent refining and recovery, advanced water treatment, flue gas Purification, blood purification, etc., put forward new and higher requirements for the properties of activated carbon such as adsorption and strength. [0003] In addition, in the production of activated carbon, the method of preparing coal-based activated carbon with coal as raw material has been widely used. In order to make the obtained activated carbon have high strength when used, it usually needs to be shaped before the coal is carbonized and activated. Therefore, coal Hig...
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